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2. 发明授权

US6161165A High performance data path with XOR on the fly 失效
标题翻译：高性能的数据路径，XOR即时运行
公开(公告)号：US6161165A
公开(公告)日：2000-12-12
申请号：US815193
申请日：1997-03-11
申请人： Robert C. Solomon , Brian K. Bailey , Robert Yates , Peter Everdell , Elizabeth H. Reeves
发明人： Robert C. Solomon , Brian K. Bailey , Robert Yates , Peter Everdell , Elizabeth H. Reeves
IPC分类号： G06F3/06 , G06F11/10 , G06F12/00 , G06F13/38
CPC分类号： G06F11/1076 , G06F2211/1054
摘要： A high performance data path for performing XOR on the fly. A first memory is connected to a first bus and a second memory is connected to a second bus selectively coupled to the first bus. Logic for performing an XOR can be switched into connection with the first and second bus for XORing data in a buffer with the data passed from one of the memories to the other memory. The result is replaced into the buffer to permit successive XORing. When reading from an interrelated group of disks such as a RAID 3 group, the data path permits an N-1 and go mode in which a read does not wait for data from the last disk to retrieve its data sector. If the last disk contains data (as opposed to parity) the data is obtained from the XORed data in the XOR buffer of the high performance data path. For writing data, the XOR on the fly generates the parity sector for writing at the completion of a write to an interrelated group of disks.
摘要翻译：用于执行XOR的高性能数据路径。第一存储器连接到第一总线，第二存储器连接到选择性地耦合到第一总线的第二总线。用于执行XOR的逻辑可以切换成与第一和第二总线连接，用于将数据从一个存储器传递到另一个存储器的缓冲器中的数据进行异或运算。结果被替换为缓冲区以允许连续的异或。当从相互关联的诸如RAID 3组的磁盘组读取数据路径时，数据路径允许N-1和去模式，其中读取不等待来自最后一个磁盘的数据来检索其数据扇区。如果最后一个磁盘包含数据（与奇偶校验相反），则从高性能数据路径的XOR缓冲区中的异或数据获取数据。对于写入数据，XOR在写入到相互关联的一组磁盘完成时，将产生用于写入的奇偶校验扇区。

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